Florida's Coral Reefs Face 'Unprecedented' Threat from Record Ocean Heat
- Sea surface temperatures off Florida highest on record, reaching up to 97F.
- Heat wave occurring earlier than expected, before usual August/September peak.
- Prolonged heat stress leads to coral bleaching and potential death.
- Bleaching already started in Central America, expected soon in Florida.
- Situation described as entering "uncharted territory" by NOAA ecologist.